Reduction of interference pickup in heads for magnetic recording by minimizing parasitic capacitance
US7573677B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2002 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Aug 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a system and a method for reducing high frequency interference pickup by the read element of the magneto-recording head. The reduction is achieved by reducing the parisitic capacitance between certain elements of the magnetic head. In one embodiment, the areas of the pads and leads, including the areas of the leads over the S1 and the areas of the sensor leads, are reduced. A second implementation involves increasing the separation between the pads and leads and the substrate material. Copper studs or vias may be used to connect the contact pads and the underlying layers. A third implementation includes using a low dielectric constant material as a spacer layer between conductors (leads, pads, magnetic shields) and the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.